Written by AZoMJul 3 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Nickel Alloy 90 is a wrought nickel-chromium-cobalt base alloy strengthened with the additions of aluminum and titanium. It has been developed as an age-hardenable creep-resisting alloy for service at temperatures up to 920°C (1688°F). The alloy has good resistance to high-temperature corrosion and oxidation.
The following section will discuss in detail about nickel alloy 90.
Chemical Composition
The chemical composition of nickel alloy 90 is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
55 |
|
Chromium, Cr |
18-21 |
|
Cobalt, Co |
15-21 |
|
Titanium, Ti |
2-3 |
|
Iron, Fe |
≤1.5 |
|
Aluminum, Al |
1-2 |
|
Manganese, Mn |
≤1 |
|
Silicon, Si |
≤1 |
|
Zirconium, Zr |
≤0.15 |
|
Carbon, C |
≤0.13 |
|
Boron, B |
≤0.02 |
Physical Properties
The following table shows the physical properties of nickel alloy 90.
|
Properties |
Metric |
Imperial |
|
Density |
8.18 g/cm3 |
0.296 lb/in3 |
|
Melting point |
1310-1370°C |
2390-2500°F |
Mechanical Properties
The mechanical properties of nickel alloy 90 are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (precipitation hardened) |
1150 MPa |
167000 psi |
|
Yield strength (precipitation hardened) |
725 MPa |
105000 psi |
|
Elongation at break (precipitation hardened) |
30% |
30% |
Thermal Properties
The thermal properties of nickel alloy 90 are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
12.7 µm/m°C |
7.06 µin/in°F |
|
Thermal conductivity |
11.5 W/mK |
79.8 BTU.in/hrft².°F |
Other Designations
Other designations that are equivalent to nickel alloy 90 include the following:
-
BS 3075 (NA19)
-
BS HR202
-
BS HR402
-
BS HR501 - HR503
-
AMS 5829
-
AFNOR NCK 20 D
-
AECMA Pr EN 2295 – 2299
-
AECMA Pr EN 2400
-
AECMA Pr EN 2401
-
AECMA Pr EN 2412
-
AECMA Pr EN 2669
-
AECMA Pr EN 2670
Applications
The following are the list of applications of nickel alloy 90:
-
Blades and disks in gas turbines
-
Springs
-
Hot-working tools.